linux-kernel - Re: [PATCH] PCI: imx6: Fix device node reference leak in imx_pcie

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Message-ID: <aXPMyYeFVvDjSMhZ@lizhi-Precision-Tower-5810>
Date: Fri, 23 Jan 2026 14:32:25 -0500
From: Frank Li <Frank.li@....com>
To: Felix Gu <ustc.gu@...il.com>
Cc: Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Trent Piepho <tpiepho@...inj.com>, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: imx6: Fix device node reference leak in
 imx_pcie_probe()

On Sat, Jan 24, 2026 at 02:18:49AM +0800, Felix Gu wrote:
> In imx_pcie_probe, np is obtained by of_parse_phandle() and must
> be released with of_node_put() when it is no longer needed.
> Add the missing of_node_put() after of_address_to_resource() to fix the
> leak.
>
> Fixes: 1df82ec46600 ("PCI: imx: Add workaround for e10728, IMX7d PCIe PLL failure")
> Signed-off-by: Felix Gu <ustc.gu@...il.com>
> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 1d8677d7de04..3ae02712d3f0 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1675,6 +1675,7 @@ static int imx_pcie_probe(struct platform_device *pdev)
>  		struct resource res;
>

Please use auto cleanup

	struct device_node *np __free(device_node) =
		of_parse_phandle(node, "fsl,imx7d-pcie-phy", 0);

Frank

>  		ret = of_address_to_resource(np, 0, &res);
> +		of_node_put(np);
>  		if (ret) {
>  			dev_err(dev, "Unable to map PCIe PHY\n");
>  			return ret;
>
> ---
> base-commit: a0c666c25aeefd16f4b088c6549a6fb6b65a8a1d
> change-id: 20260124-pci_imx6-f97d70887dfc
>
> Best regards,
> --
> Felix Gu <ustc.gu@...il.com>
>